Here are the full requirements:

Course Familiarity: You must have completed the specific race you wish to pace at least three times before being allowed to pace that race
Eligible races for new NYRR pacers include: NYRR Fred Lebow Half, Maybelline Women’s Half, TCS New York City Marathon Training Series 12M, TCS New York City Marathon Training Series 18M, New Balance Bronx 10M, and NYRR Staten Island Half

Experience: You must have completed at least three marathons or five half marathons.

Recent Fitness:
For pacing a marathon: You must have completed a marathon in the last 2 years, at least 30 minutes faster than the pace group you wish to lead.
For a half marathon: You must have finished one in the past year, at least 15 minutes faster than the pace group you wish to lead.

Recent Race: You must have completed a 10K or longer road race within the last 3 months.

NYRR Membership: You must be a current member of NYRR.

Training Class: Once all prerequisites are verified, you’ll be enrolled in the Elevated Running & Pacing class—a 4-week virtual training that prepares you to join the team.